alnus rubra

After Snowpocalypse, how are the trees doing?

Here in the Pacific NW, we had an uncommonly cold and snowy February. Did this affect the new buds on trees and shrubs?

In the fall, why are alder leaves on the forest floor still green?

In the fall, leaves on alder trees remain stubbornly green, even after they fall to the forest floor. This is because alder trees do not remove the green chlorophyll from the leaves before sending them to "recycling." Why not?